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            <h1 style="display: none">编写css代码中所遇到的问题</h1>
            
            
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                <h1 id="01-设置浏览器显示小于12px一下字体的方式"><a href="#01-设置浏览器显示小于12px一下字体的方式" class="headerlink" title="01. 设置浏览器显示小于12px一下字体的方式"></a>01. 设置浏览器显示小于12px一下字体的方式</h1><h2 id="场景"><a href="#场景" class="headerlink" title="场景:"></a>场景:</h2><p>谷歌浏览器显示字体最小为12px, 所以运行 <code>font-size: 10px</code> 所显示的结果任然是12px大小. 在一些特殊要求情况下需要显示小于12px大小的字体</p>
<h2 id="解决方法"><a href="#解决方法" class="headerlink" title="解决方法"></a>解决方法</h2><h3 id="1-使用缩放transform-scale"><a href="#1-使用缩放transform-scale" class="headerlink" title="1.使用缩放transform:scale()"></a>1.使用缩放transform:scale()</h3><p><strong>优点:</strong> 单行、多行文本都可使用</p>
<p><strong>缺点:</strong> 只是视觉效果变小，并不会改变盒子的实际占位，在对齐其他盒子时不太友好</p>
<p><strong>注意点:</strong></p>
<ul>
<li>缩放只对有宽高的标签有效 (行内块,块) , 缩放直接将标签一起缩放 不仅仅缩放文本</li>
<li>缩放默认中心点是在盒子正中心, 如果要文本左对齐 就需要改变中心点.  使用 <code>transform-origin：0 0；</code> 方法的两个参数 , 一个是水平方位值 , 一个是垂直方位值</li>
<li>文本进行缩放后不会改变原来盒子的大小, 如果文本有换行, 进行缩放后依旧是换行显示. 这时可以设置强制换行 <code>white-space: nowrap;</code></li>
</ul>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br></pre></td><td class="code"><pre><code class="hljs html"><span class="hljs-meta">&lt;!DOCTYPE <span class="hljs-keyword">html</span>&gt;</span><br><span class="hljs-tag">&lt;<span class="hljs-name">html</span> <span class="hljs-attr">lang</span>=<span class="hljs-string">&quot;en&quot;</span>&gt;</span><br><span class="hljs-tag">&lt;<span class="hljs-name">head</span>&gt;</span><br>    <span class="hljs-tag">&lt;<span class="hljs-name">meta</span> <span class="hljs-attr">charset</span>=<span class="hljs-string">&quot;UTF-8&quot;</span>&gt;</span><br>    <span class="hljs-tag">&lt;<span class="hljs-name">meta</span> <span class="hljs-attr">http-equiv</span>=<span class="hljs-string">&quot;X-UA-Compatible&quot;</span> <span class="hljs-attr">content</span>=<span class="hljs-string">&quot;IE=edge&quot;</span>&gt;</span><br>    <span class="hljs-tag">&lt;<span class="hljs-name">meta</span> <span class="hljs-attr">name</span>=<span class="hljs-string">&quot;viewport&quot;</span> <span class="hljs-attr">content</span>=<span class="hljs-string">&quot;width=device-width, initial-scale=1.0&quot;</span>&gt;</span><br>    <span class="hljs-tag">&lt;<span class="hljs-name">title</span>&gt;</span>Document<span class="hljs-tag">&lt;/<span class="hljs-name">title</span>&gt;</span><br>    <span class="hljs-tag">&lt;<span class="hljs-name">style</span>&gt;</span><br>        div &#123;<br>            width: 300px;<br>            height: 30px;<br>            margin-bottom: 5px;<br>            background: rgb(206, 151, 151);<br>        &#125;<br>        .box1 &#123;<br>            font-size: 12px;<br>        &#125;<br>        .box2 &#123;<br>            font-size: 10px;<br>            //如果需要显示10px大小的效果 就设置值为 (10/12) = 0.83333..<br>            transform: scale(0.83333);<br>            transform-origin: 0 0;<br>            white-space: nowrap;<br>        &#125;<br>    <span class="hljs-tag">&lt;/<span class="hljs-name">style</span>&gt;</span><br><span class="hljs-tag">&lt;/<span class="hljs-name">head</span>&gt;</span><br><span class="hljs-tag">&lt;<span class="hljs-name">body</span>&gt;</span><br>    <span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;box1&quot;</span>&gt;</span>我是正常的12px的文字大小 Hello world!<span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span><br>    <span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;box1&quot;</span>&gt;</span>我是正常的12px的文字大小 Hello world!<span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span><br>    <span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;box2&quot;</span>&gt;</span>我是正常的10px的文字大小 Hello world!<span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span><br>    <span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;box2&quot;</span>&gt;</span>我是正常的10px的文字大小 Hello world!<span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span><br><span class="hljs-tag">&lt;/<span class="hljs-name">body</span>&gt;</span><br><span class="hljs-tag">&lt;/<span class="hljs-name">html</span>&gt;</span><br></code></pre></td></tr></table></figure>





<h3 id="2-使用SVG设置text"><a href="#2-使用SVG设置text" class="headerlink" title="2.使用SVG设置text"></a>2.使用SVG设置text</h3><p><strong>优点:</strong> 1px-12px任意字号均可设置，可对设计界面进行对齐调整</p>
<p><strong>缺点:</strong> 不支持多行文本</p>
<p><strong>注意点:</strong> </p>
<ul>
<li>svg没有换行符,文本不支持换行显示</li>
<li>默认所有单个或连续多个空格、换行符等转为一个空格来显示。</li>
</ul>
<figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br></pre></td><td class="code"><pre><code class="hljs html"><span class="hljs-meta">&lt;!DOCTYPE <span class="hljs-keyword">html</span>&gt;</span><br><span class="hljs-tag">&lt;<span class="hljs-name">html</span> <span class="hljs-attr">lang</span>=<span class="hljs-string">&quot;en&quot;</span>&gt;</span><br><span class="hljs-tag">&lt;<span class="hljs-name">head</span>&gt;</span><br>  <span class="hljs-tag">&lt;<span class="hljs-name">meta</span> <span class="hljs-attr">charset</span>=<span class="hljs-string">&quot;UTF-8&quot;</span>&gt;</span><br>  <span class="hljs-tag">&lt;<span class="hljs-name">meta</span> <span class="hljs-attr">http-equiv</span>=<span class="hljs-string">&quot;X-UA-Compatible&quot;</span> <span class="hljs-attr">content</span>=<span class="hljs-string">&quot;IE=edge&quot;</span>&gt;</span><br>  <span class="hljs-tag">&lt;<span class="hljs-name">meta</span> <span class="hljs-attr">name</span>=<span class="hljs-string">&quot;viewport&quot;</span> <span class="hljs-attr">content</span>=<span class="hljs-string">&quot;width=device-width, initial-scale=1.0&quot;</span>&gt;</span><br>  <span class="hljs-tag">&lt;<span class="hljs-name">title</span>&gt;</span>Document<span class="hljs-tag">&lt;/<span class="hljs-name">title</span>&gt;</span><br>  <span class="hljs-tag">&lt;<span class="hljs-name">style</span>&gt;</span><span class="language-css"></span><br><span class="language-css">    <span class="hljs-selector-tag">div</span>&#123;<span class="hljs-attribute">font-size</span>: <span class="hljs-number">12px</span>;&#125;</span><br><span class="language-css">    svg&#123;<span class="hljs-attribute">width</span>: <span class="hljs-number">100px</span>;<span class="hljs-attribute">height</span>: <span class="hljs-number">100px</span>;<span class="hljs-attribute">background-color</span>: chocolate;&#125;</span><br><span class="language-css">    svg text &#123;<span class="hljs-attribute">font-size</span>: <span class="hljs-number">8px</span>;&#125;</span><br><span class="language-css">  </span><span class="hljs-tag">&lt;/<span class="hljs-name">style</span>&gt;</span><br><span class="hljs-tag">&lt;/<span class="hljs-name">head</span>&gt;</span><br><span class="hljs-tag">&lt;<span class="hljs-name">body</span>&gt;</span><br>  <span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span>我是最小12px字体大小 hello world！<span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span><br>  <span class="hljs-tag">&lt;<span class="hljs-name">svg</span>&gt;</span><br>    <span class="hljs-comment">&lt;!-- svg是矢量图的概念方法，这里的文本并不支持换行显示，即使你设置的svg的宽高足够大 --&gt;</span><br>    <span class="hljs-comment">&lt;!-- text文本设置样式的方法和普通标签设置的方法不一样，例如文本颜色填充是用fill设置，并不是color --&gt;</span><br>    <span class="hljs-tag">&lt;<span class="hljs-name">text</span> <span class="hljs-attr">x</span>=<span class="hljs-string">&quot;0&quot;</span> <span class="hljs-attr">y</span>=<span class="hljs-string">&quot;8&quot;</span> &gt;</span>我是10px字体大小 hello world！<span class="hljs-tag">&lt;/<span class="hljs-name">text</span>&gt;</span>&gt;<br>  <span class="hljs-tag">&lt;/<span class="hljs-name">svg</span>&gt;</span><br><span class="hljs-tag">&lt;/<span class="hljs-name">body</span>&gt;</span><br><span class="hljs-tag">&lt;/<span class="hljs-name">html</span>&gt;</span><br></code></pre></td></tr></table></figure>







<h1 id="02-禁用div标签"><a href="#02-禁用div标签" class="headerlink" title="02.禁用div标签"></a>02.禁用div标签</h1><h2 id="需求"><a href="#需求" class="headerlink" title="需求:"></a><strong>需求:</strong></h2><p>在某种情况禁止点击div</p>
<h2 id="原理"><a href="#原理" class="headerlink" title="原理:"></a>原理:</h2><ul>
<li>使用css的 <code>pointer-events: none;</code> 属性<ul>
<li>该属性可以指定, 在某种情况下 某个特定的标签可以成为鼠标事件的target</li>
<li>设置为none 就是永远不会成为鼠标事件的target</li>
</ul>
</li>
</ul>
<h2 id="实现"><a href="#实现" class="headerlink" title="实现:"></a><strong>实现:</strong></h2><figure class="highlight html"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br></pre></td><td class="code"><pre><code class="hljs html"><span class="hljs-meta">&lt;!DOCTYPE <span class="hljs-keyword">html</span>&gt;</span><br><span class="hljs-tag">&lt;<span class="hljs-name">html</span> <span class="hljs-attr">lang</span>=<span class="hljs-string">&quot;en&quot;</span>&gt;</span><br><span class="hljs-tag">&lt;<span class="hljs-name">head</span>&gt;</span><br>  <span class="hljs-tag">&lt;<span class="hljs-name">meta</span> <span class="hljs-attr">charset</span>=<span class="hljs-string">&quot;UTF-8&quot;</span>&gt;</span><br>  <span class="hljs-tag">&lt;<span class="hljs-name">meta</span> <span class="hljs-attr">http-equiv</span>=<span class="hljs-string">&quot;X-UA-Compatible&quot;</span> <span class="hljs-attr">content</span>=<span class="hljs-string">&quot;IE=edge&quot;</span>&gt;</span><br>  <span class="hljs-tag">&lt;<span class="hljs-name">meta</span> <span class="hljs-attr">name</span>=<span class="hljs-string">&quot;viewport&quot;</span> <span class="hljs-attr">content</span>=<span class="hljs-string">&quot;width=device-width, initial-scale=1.0&quot;</span>&gt;</span><br>  <span class="hljs-tag">&lt;<span class="hljs-name">title</span>&gt;</span>Document<span class="hljs-tag">&lt;/<span class="hljs-name">title</span>&gt;</span><br>  <span class="hljs-tag">&lt;<span class="hljs-name">style</span>&gt;</span><span class="language-css"></span><br><span class="language-css">      <span class="hljs-selector-tag">div</span> &#123;</span><br><span class="language-css">          <span class="hljs-attribute">pointer-events</span>: none;</span><br><span class="language-css">      &#125;</span><br><span class="language-css">  </span><span class="hljs-tag">&lt;/<span class="hljs-name">style</span>&gt;</span><br><span class="hljs-tag">&lt;/<span class="hljs-name">head</span>&gt;</span><br><span class="hljs-tag">&lt;<span class="hljs-name">body</span>&gt;</span><br>    <span class="hljs-comment">&lt;!-- --&gt;</span><br>  <span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span>我被禁止了！<span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span><br><span class="hljs-tag">&lt;/<span class="hljs-name">body</span>&gt;</span><br><span class="hljs-tag">&lt;/<span class="hljs-name">html</span>&gt;</span><br></code></pre></td></tr></table></figure>



<h1 id="03-子元素填满父元素剩余空间"><a href="#03-子元素填满父元素剩余空间" class="headerlink" title="03.子元素填满父元素剩余空间"></a>03.子元素填满父元素剩余空间</h1><figure class="highlight css"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><code class="hljs css"><span class="hljs-selector-class">.father</span>&#123; <span class="hljs-attribute">display</span>: flex; &#125;<br><span class="hljs-selector-class">.son</span>&#123; <span class="hljs-attribute">flex-grow</span>: <span class="hljs-number">1</span>; &#125;<br></code></pre></td></tr></table></figure>


                
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